高中英语 Unit22《Lesson1》课件 北师大版选修8

高中英语 选修8

Lesson 1

Global Warming

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Appreciation of a film trailer

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Words previewconsensus beyond claim relevant ray bounce pin n. 一致的意见 prep. 超出 vt. 声称 adj. 有关的 n. 光线 vi. 反弹 vt. 固定

高中英语 选修8

Words previewagriculture coincidence condemn drought federal reservation sacrifice n. 农业 n. 巧合 vt. 宣判死刑,注定毁灭 n. 旱灾 adj. 联邦的 n. 保留,存疑 vt., vi. 牺牲,献出

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Words previewadvocate recycle substitute threaten pancake hurricane vt. 主张,提倡 vt. 回收利用 n. 代替品,代用品 vt. 威胁 n. 薄煎饼 n. 飓风

高中英语 选修8

Expressions previewbeyond one’s control 超出……的控制， 不受……的控制 look ahead 展望未来 refer to 指,意即 in turn 依次 lead to 引起,导致 take action 采取行动 ahead of 在……前面

高中英语 选修8

Look at the pictures and what do you know about global warming.

高中英语 选修8

高中英语 选修8

The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Without these gases, heat would escape back into space and Earth’s average temperature would be about 60º F colder. Because of how they warm our world, these gases are referred to as greenhouse gases.

高中英语 选修8

高中英语 选修8

Without this greenhouse heating, the Earth's average temperature would be only about -73 C (-100 F); even the oceans would be frozen under such conditions, such as the Moon and the Mars. Moon Mars

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Some greenhouse gases occur naturally in the atmosphere, while others result from human activities. Naturally occurring greenhouse gases include water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Certain human activities, however, add to the levels of most of these naturally occurring gases .

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Owing to the rise in atmospheric carbon dioxide caused by modern industrial societies' widespread combustion of fossil fuels (coal, oil, and natural gas), the greenhouse effect on Earth may be intensified and long-term climatic changes may result.

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Which countries do you think contribute more to global warning? a) developed countries b) developing countries more industry and technology

高中英语 选修8

What effect will global warming have on the sea and the living things in the sea?

高中英语 选修8

What will happen with global warming?